fun-lim

Related Questions

• Let $f(x)=\frac{{{x}^{2}}-4}{{{x}^{2}}+4}$ for $|x|\ >2$, then the function $f:(-\infty ,\ -2]\cup [2,\ \infty )\to (-1,\ 1)$ is

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• The range of $f(x)=\cos x-\sin x$ is

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• $\underset{\alpha \to \pi /4}{\mathop{\lim }}\,\frac{\sin \alpha -\cos \alpha }{\alpha -\frac{\pi }{4}}=$

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• $\underset{n\to \infty }{\mathop{\lim }}\,\frac{n{{(2n+1)}^{2}}}{(n+2)({{n}^{2}}+3n-1)}=$

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• If $f(x)=\log \frac{1+x}{1-x}$, then $f(x)$ is

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